Lines Matching +full:imx7ulp +full:- +full:lpi2c
1 // SPDX-License-Identifier: GPL-2.0+
26 #define DRIVER_NAME "imx-lpi2c"
115 writel(enable, lpi2c_imx->base + LPI2C_MIER); in lpi2c_imx_intctrl()
124 temp = readl(lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_bus_busy()
128 writel(temp, lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_bus_busy()
129 return -EAGAIN; in lpi2c_imx_bus_busy()
136 dev_dbg(&lpi2c_imx->adapter.dev, "bus not work\n"); in lpi2c_imx_bus_busy()
137 return -ETIMEDOUT; in lpi2c_imx_bus_busy()
147 unsigned int bitrate = lpi2c_imx->bitrate; in lpi2c_imx_set_mode()
161 lpi2c_imx->mode = mode; in lpi2c_imx_set_mode()
169 temp = readl(lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_start()
171 writel(temp, lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_start()
172 writel(0x7f00, lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_start()
175 writel(temp, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_start()
185 writel(GEN_STOP << 8, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_stop()
188 temp = readl(lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_stop()
193 dev_dbg(&lpi2c_imx->adapter.dev, "stop timeout\n"); in lpi2c_imx_stop()
211 clk_rate = lpi2c_imx->rate_per; in lpi2c_imx_config()
213 if (lpi2c_imx->mode == HS || lpi2c_imx->mode == ULTRA_FAST) in lpi2c_imx_config()
219 clk_cycle = clk_rate / ((1 << prescale) * lpi2c_imx->bitrate) in lpi2c_imx_config()
220 - 3 - (filt >> 1); in lpi2c_imx_config()
222 clklo = clk_cycle - clkhi; in lpi2c_imx_config()
228 return -EINVAL; in lpi2c_imx_config()
231 if (lpi2c_imx->mode == ULTRA_FAST) in lpi2c_imx_config()
237 if (lpi2c_imx->mode == ULTRA_FAST) in lpi2c_imx_config()
240 writel(temp, lpi2c_imx->base + LPI2C_MCFGR1); in lpi2c_imx_config()
244 writel(temp, lpi2c_imx->base + LPI2C_MCFGR2); in lpi2c_imx_config()
251 if (lpi2c_imx->mode == HS) in lpi2c_imx_config()
252 writel(temp, lpi2c_imx->base + LPI2C_MCCR1); in lpi2c_imx_config()
254 writel(temp, lpi2c_imx->base + LPI2C_MCCR0); in lpi2c_imx_config()
264 ret = pm_runtime_resume_and_get(lpi2c_imx->adapter.dev.parent); in lpi2c_imx_master_enable()
269 writel(temp, lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_enable()
270 writel(0, lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_enable()
276 temp = readl(lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_enable()
278 writel(temp, lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_enable()
283 pm_runtime_mark_last_busy(lpi2c_imx->adapter.dev.parent); in lpi2c_imx_master_enable()
284 pm_runtime_put_autosuspend(lpi2c_imx->adapter.dev.parent); in lpi2c_imx_master_enable()
293 temp = readl(lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_disable()
295 writel(temp, lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_disable()
297 pm_runtime_mark_last_busy(lpi2c_imx->adapter.dev.parent); in lpi2c_imx_master_disable()
298 pm_runtime_put_autosuspend(lpi2c_imx->adapter.dev.parent); in lpi2c_imx_master_disable()
307 timeout = wait_for_completion_timeout(&lpi2c_imx->complete, HZ); in lpi2c_imx_msg_complete()
309 return timeout ? 0 : -ETIMEDOUT; in lpi2c_imx_msg_complete()
318 txcnt = readl(lpi2c_imx->base + LPI2C_MFSR) & 0xff; in lpi2c_imx_txfifo_empty()
320 if (readl(lpi2c_imx->base + LPI2C_MSR) & MSR_NDF) { in lpi2c_imx_txfifo_empty()
321 dev_dbg(&lpi2c_imx->adapter.dev, "NDF detected\n"); in lpi2c_imx_txfifo_empty()
322 return -EIO; in lpi2c_imx_txfifo_empty()
326 dev_dbg(&lpi2c_imx->adapter.dev, "txfifo empty timeout\n"); in lpi2c_imx_txfifo_empty()
327 return -ETIMEDOUT; in lpi2c_imx_txfifo_empty()
338 writel(lpi2c_imx->txfifosize >> 1, lpi2c_imx->base + LPI2C_MFCR); in lpi2c_imx_set_tx_watermark()
345 remaining = lpi2c_imx->msglen - lpi2c_imx->delivered; in lpi2c_imx_set_rx_watermark()
347 if (remaining > (lpi2c_imx->rxfifosize >> 1)) in lpi2c_imx_set_rx_watermark()
348 temp = lpi2c_imx->rxfifosize >> 1; in lpi2c_imx_set_rx_watermark()
352 writel(temp << 16, lpi2c_imx->base + LPI2C_MFCR); in lpi2c_imx_set_rx_watermark()
359 txcnt = readl(lpi2c_imx->base + LPI2C_MFSR) & 0xff; in lpi2c_imx_write_txfifo()
361 while (txcnt < lpi2c_imx->txfifosize) { in lpi2c_imx_write_txfifo()
362 if (lpi2c_imx->delivered == lpi2c_imx->msglen) in lpi2c_imx_write_txfifo()
365 data = lpi2c_imx->tx_buf[lpi2c_imx->delivered++]; in lpi2c_imx_write_txfifo()
366 writel(data, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_write_txfifo()
370 if (lpi2c_imx->delivered < lpi2c_imx->msglen) in lpi2c_imx_write_txfifo()
373 complete(&lpi2c_imx->complete); in lpi2c_imx_write_txfifo()
382 data = readl(lpi2c_imx->base + LPI2C_MRDR); in lpi2c_imx_read_rxfifo()
386 lpi2c_imx->rx_buf[lpi2c_imx->delivered++] = data & 0xff; in lpi2c_imx_read_rxfifo()
391 * data read. Add it to msgs->len. in lpi2c_imx_read_rxfifo()
393 if (lpi2c_imx->block_data) { in lpi2c_imx_read_rxfifo()
394 blocklen = lpi2c_imx->rx_buf[0]; in lpi2c_imx_read_rxfifo()
395 lpi2c_imx->msglen += blocklen; in lpi2c_imx_read_rxfifo()
398 remaining = lpi2c_imx->msglen - lpi2c_imx->delivered; in lpi2c_imx_read_rxfifo()
401 complete(&lpi2c_imx->complete); in lpi2c_imx_read_rxfifo()
409 if (lpi2c_imx->block_data) { in lpi2c_imx_read_rxfifo()
410 lpi2c_imx->block_data = 0; in lpi2c_imx_read_rxfifo()
413 writel(temp, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_read_rxfifo()
414 } else if (!(lpi2c_imx->delivered & 0xff)) { in lpi2c_imx_read_rxfifo()
415 temp = (remaining > CHUNK_DATA ? CHUNK_DATA : remaining) - 1; in lpi2c_imx_read_rxfifo()
417 writel(temp, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_read_rxfifo()
426 lpi2c_imx->tx_buf = msgs->buf; in lpi2c_imx_write()
436 lpi2c_imx->rx_buf = msgs->buf; in lpi2c_imx_read()
437 lpi2c_imx->block_data = msgs->flags & I2C_M_RECV_LEN; in lpi2c_imx_read()
440 temp = msgs->len > CHUNK_DATA ? CHUNK_DATA - 1 : msgs->len - 1; in lpi2c_imx_read()
442 writel(temp, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_read()
467 lpi2c_imx->rx_buf = NULL; in lpi2c_imx_xfer()
468 lpi2c_imx->tx_buf = NULL; in lpi2c_imx_xfer()
469 lpi2c_imx->delivered = 0; in lpi2c_imx_xfer()
470 lpi2c_imx->msglen = msgs[i].len; in lpi2c_imx_xfer()
471 init_completion(&lpi2c_imx->complete); in lpi2c_imx_xfer()
492 temp = readl(lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_xfer()
494 result = -EIO; in lpi2c_imx_xfer()
499 dev_dbg(&lpi2c_imx->adapter.dev, "<%s> exit with: %s: %d\n", __func__, in lpi2c_imx_xfer()
512 enabled = readl(lpi2c_imx->base + LPI2C_MIER); in lpi2c_imx_isr()
515 temp = readl(lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_isr()
519 complete(&lpi2c_imx->complete); in lpi2c_imx_isr()
540 { .compatible = "fsl,imx7ulp-lpi2c" },
551 lpi2c_imx = devm_kzalloc(&pdev->dev, sizeof(*lpi2c_imx), GFP_KERNEL); in lpi2c_imx_probe()
553 return -ENOMEM; in lpi2c_imx_probe()
555 lpi2c_imx->base = devm_platform_ioremap_resource(pdev, 0); in lpi2c_imx_probe()
556 if (IS_ERR(lpi2c_imx->base)) in lpi2c_imx_probe()
557 return PTR_ERR(lpi2c_imx->base); in lpi2c_imx_probe()
563 lpi2c_imx->adapter.owner = THIS_MODULE; in lpi2c_imx_probe()
564 lpi2c_imx->adapter.algo = &lpi2c_imx_algo; in lpi2c_imx_probe()
565 lpi2c_imx->adapter.dev.parent = &pdev->dev; in lpi2c_imx_probe()
566 lpi2c_imx->adapter.dev.of_node = pdev->dev.of_node; in lpi2c_imx_probe()
567 strscpy(lpi2c_imx->adapter.name, pdev->name, in lpi2c_imx_probe()
568 sizeof(lpi2c_imx->adapter.name)); in lpi2c_imx_probe()
570 ret = devm_clk_bulk_get_all(&pdev->dev, &lpi2c_imx->clks); in lpi2c_imx_probe()
572 return dev_err_probe(&pdev->dev, ret, "can't get I2C peripheral clock\n"); in lpi2c_imx_probe()
573 lpi2c_imx->num_clks = ret; in lpi2c_imx_probe()
575 ret = of_property_read_u32(pdev->dev.of_node, in lpi2c_imx_probe()
576 "clock-frequency", &lpi2c_imx->bitrate); in lpi2c_imx_probe()
578 lpi2c_imx->bitrate = I2C_MAX_STANDARD_MODE_FREQ; in lpi2c_imx_probe()
580 ret = devm_request_irq(&pdev->dev, irq, lpi2c_imx_isr, 0, in lpi2c_imx_probe()
581 pdev->name, lpi2c_imx); in lpi2c_imx_probe()
583 return dev_err_probe(&pdev->dev, ret, "can't claim irq %d\n", irq); in lpi2c_imx_probe()
585 i2c_set_adapdata(&lpi2c_imx->adapter, lpi2c_imx); in lpi2c_imx_probe()
588 ret = clk_bulk_prepare_enable(lpi2c_imx->num_clks, lpi2c_imx->clks); in lpi2c_imx_probe()
592 lpi2c_imx->rate_per = clk_get_rate(lpi2c_imx->clks[0].clk); in lpi2c_imx_probe()
593 if (!lpi2c_imx->rate_per) in lpi2c_imx_probe()
594 return dev_err_probe(&pdev->dev, -EINVAL, in lpi2c_imx_probe()
597 pm_runtime_set_autosuspend_delay(&pdev->dev, I2C_PM_TIMEOUT); in lpi2c_imx_probe()
598 pm_runtime_use_autosuspend(&pdev->dev); in lpi2c_imx_probe()
599 pm_runtime_get_noresume(&pdev->dev); in lpi2c_imx_probe()
600 pm_runtime_set_active(&pdev->dev); in lpi2c_imx_probe()
601 pm_runtime_enable(&pdev->dev); in lpi2c_imx_probe()
603 temp = readl(lpi2c_imx->base + LPI2C_PARAM); in lpi2c_imx_probe()
604 lpi2c_imx->txfifosize = 1 << (temp & 0x0f); in lpi2c_imx_probe()
605 lpi2c_imx->rxfifosize = 1 << ((temp >> 8) & 0x0f); in lpi2c_imx_probe()
607 ret = i2c_add_adapter(&lpi2c_imx->adapter); in lpi2c_imx_probe()
611 pm_runtime_mark_last_busy(&pdev->dev); in lpi2c_imx_probe()
612 pm_runtime_put_autosuspend(&pdev->dev); in lpi2c_imx_probe()
614 dev_info(&lpi2c_imx->adapter.dev, "LPI2C adapter registered\n"); in lpi2c_imx_probe()
619 pm_runtime_put(&pdev->dev); in lpi2c_imx_probe()
620 pm_runtime_disable(&pdev->dev); in lpi2c_imx_probe()
621 pm_runtime_dont_use_autosuspend(&pdev->dev); in lpi2c_imx_probe()
630 i2c_del_adapter(&lpi2c_imx->adapter); in lpi2c_imx_remove()
632 pm_runtime_disable(&pdev->dev); in lpi2c_imx_remove()
633 pm_runtime_dont_use_autosuspend(&pdev->dev); in lpi2c_imx_remove()
640 clk_bulk_disable(lpi2c_imx->num_clks, lpi2c_imx->clks); in lpi2c_runtime_suspend()
652 ret = clk_bulk_enable(lpi2c_imx->num_clks, lpi2c_imx->clks); in lpi2c_runtime_resume()
681 MODULE_DESCRIPTION("I2C adapter driver for LPI2C bus");